/*
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The ASF licenses this file to You under the Apache License, Version 2.0
 * (the "License"); you may not use this file except in compliance with
 * the License.  You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 *
 */

package org.apache.skywalking.oap.server.core.config.group.uri.quickmatch;

import java.util.ArrayList;
import java.util.List;
import lombok.EqualsAndHashCode;
import lombok.Setter;

@EqualsAndHashCode(of = "")
public class VarToken implements PatternToken {
    public static final String VAR_TOKEN = "{var}";
    private List<PatternToken> children = new ArrayList<>();
    @Setter
    private String expression;

    /**
     * @return TRUE for any input string.
     */
    @Override
    public boolean isMatch(final String name) {
        return true;
    }

    @Override
    public boolean isLeaf() {
        return expression != null;
    }

    @Override
    public String expression() {
        return expression;
    }

    @Override
    public List<PatternToken> children() {
        return children;
    }

    @Override
    public String toString() {
        return "VarToken: \"" + VAR_TOKEN + "\"";
    }
}
